Hi. 

So, first off, thanks for testing!

Initial thoughts: 

* We might need a bit more to be able to reproduce — are you able to narrow 
down the problem? 
* "Which migration it is varies between runs" — that sounds fun 😀
* "Changing AppConfig.name..." — The AppConfig loading was reworked, it 
could be that: 
 
https://docs.djangoproject.com/en/dev/releases/3.2/#automatic-appconfig-discovery

Can I ask you to get as close as you can to directions for a reproduce and 
open a ticket on Trac?
https://code.djangoproject.com/newticket

If you can't get to a reproduce, it's still worth opening a ticket with as 
much info as you can:
  * Maybe someone is able to say "Oh, it's this"
  * Provides info for anyone else hitting this. 

Thanks again! 

Kind Regards,

Carlton


On Thursday, 18 March 2021 at 15:26:23 UTC+1 HM wrote:

> Changing AppConfig.name to just "app" leads to ModuleNotFoundError: No
> module named 'app'.
>
> Changing the path in INSTALLED_APPS to "prefix.app.apps.AppConfig"
> instead leads to the same NodeNotFoundError as before.
>
> On Thu, 18 Mar 2021 at 15:06, Hanne Moa <hann...@gmail.com> wrote:
> >
> > I have some migrations that runs/tests fine on Django 3.0 and 3.1, but
> > not on 3.2b1.
> >
> > There's a specific app whose migrations fail with:
> >
> > django.db.migrations.exceptions.NodeNotFoundError: Migration
> > prefix_app.000N_fooFoo dependencies reference nonexistent parent node
> > ('app', '000M_bar').
> >
> > Which migration it is varies between runs, and note that the first app
> > label looks different than the second. Is there some new way to
> > auto-generate app labels that leads to this?
> >
> > In INSTALLED_APPS the app in question is by path: "prefix.app". In the
> > AppConfig, "name" is identical to the path, "prefix.app", while
> > "label" is "prefix_app". The models do not have an explicit tablename
> > set and in the database they have been created with
> > "app_modelnameinlowercase", not "prefix_app_modelnameinlowercase".
> >
> >
> > HM
>

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